Extremely well.
Ended up with a FTP within 5 watts off my all time high (5 - 6 years earlier.) Never felt burnt out or even close to being burnt out, could just live my normal life. By contrast when following a Threshold / SST model I was always on the edge of burnout or tired and somedays to tired to do those jobs around the house orwhen spending time with the family I was knackered and not really there enjoying the moment.
POL also resulted in a deeper fitness more resilience, could ride at a higher percentage of FTP for an age, SST fitness although a FTP only 5 - 10 watts lower seemed more brittle.
Note my all time FTP was all riding outside, training was just easy enjoyable rides (although most had hard moments) and hammer fests the weekend and once on week days, no idea what modality it was, didn’t know about modalities back then, but I’d guess it was polarised or HIIT